Blower apparatus



Aug. 15, 1939 A. 1. PONOMAREFF BLOWER APPARATUS Original Filed Nov. 27,1937 INVENT'OR H1. sxmvnsn I PONOMHREFF- Patented Aug. 15, 1939 UNITEDSTATES PATENT OFFICE BLOWER APPARATUS Alexander I. Pononiarefl', DrexelHill, Pm, assignor to Westinghouse Electric a Manufacturing Company,East Pittsburg of Pennsylvania Pa, in poration 2 Claims.

My invention relates to propeller blowers and it has for an object toprovide baflle means at the discharge side of the propeller forresisting recirculation in order to reduce pressure fluctuations s orpulsations.

In the application of Warren B. Flanders, Serial No. 183,727, filedSeptember 14, 1937, there is disclosed and claimed baffles for resistingrecirculation in propeller blowers in order to reduce presl surefluctuations or pulsations. In said application, bailies are shownarranged adjacent to the inlet edges of propeller blades or incorporatedin the propeller. I find that baflle means arranged contiguously, to theleaving edges of a propeller 16 is also effective for the same purpose.

P These and other objects are effected by my invention as will beapparent from the following de-.

scription and claims taken in connection with the accompanying drawingforming a part of this 20 application, in which:

Fig. l is a vertical sectional view of a propeller blower incorporatingthe preferred form of my improved baifle means;

Figs. 2 and 3 are views showing further forms as of the baiile means;and,

Fig. 4 is a detail view showing a modified form of baflie support.

In the drawing, there is shown a propeller blower, at ill, includingstator structure, at H. 80 and rotor structure, at II, the rotorstructure including a propeller l3 and its drive shaft I4 and the statorstructure including a casing I5 connected by guide vanes It to the shafttube II,

the guide vanes being at the discharge side of the propeller. Inaccordance with my invention, circumferentially-extending bailie meansIt has its inletedge I I arranged as close as practicable to thedischarge edges 20 of the propeller blades and its extends axially, orin the direction of fluid flow,

to such an extent as to aflord adequate resistance to recirculation.

The baille means It is carried by the stator as structure, at H,preferably by the guide vanes l6,

the inlet edge ll ofthe baille extending forwardly of the inlet edges ofthe guide vanes l6.

While the circumferentially-extending bafile means is preferablycircular, as shown at I8 in Fig. 1, it may be comprised by a pluralityof sections 2|, as shown in Fig. 2 or sections 21a as shown in Fig. 3,which collectively serve the same purpose.

While, in Figs. 1, 2 and 3, the baflle means is carried by the guidevane part of the stator structure, it will be obvious that it may becarried by any other suitable part thereof, for example, in Fig. 4, suchbaiile means 22 is supported by arms 23 from the interior of the casingit.

While I have shown my invention in several forms, it will be obvious tothose skilled in the art that it is not so limited but is susceptible ofvarious other changes and modifications without departing from thespirit thereof, and I desire, therefore, that only such limitationsshall be placed thereupon as are imposed by the prior 'art or as arespecifically set forth in the appended claims.

'What I claim is:

1. In a propeller blower, a rotor structure including a propeller, astator structure including a casing encompassing the propeller, guidevanes at the discharge side of the latter, andcircumferentially-extending bai'ile means carried by the statorstructure, said baiiie means extending in the direction of fluid fiowand having its inlet edge disposed contiguously to the leaving edges ofthe propeller blades so as to resist recirculation of medium translatedby the propeller.

2. In a propeller blower, a casing, a propeller in the casing, guidevanes at the discharge side of the propeller, andcircumferentially-extending baflle means carried by the guide vanes,said baffie means extending in the direction of fluid flow and havingits inlet edge arranged forwardly oi 40 the inlet edges of the guidevanes so as to be disposed contiguously to the leaving edges of thepropeller blades so as to resist recirculation of medium translated bythe propeller.

ALEXANDER I. PONOMAREFF. 45

